feat: initial open-source release of Pipely

OTA update server designed for high-concurrency, low-bandwidth deployments.
GORM-backed PostgreSQL, JWT auth, device management, artefact versioning,
deployment rollout with gated rate-limited downloads, and a React admin panel.

internal/auth/repositoriy.go

@@ -0,0 +1,4 @@
+package auth
+
+// Repository functions are in internal/database/repository.go (AdminUser methods).
+// This file exists to satisfy the package structure for future auth-specific queries.